Statistics on our web apps

We had a seven webapps online the last weeks and they are still running. Due to some memory leaks we have to restart an app every few days, but that should be fixed soon. So far we had thousands of visitors or maybe just a few hundred. We wrote logs to a database and here are a few numbers:

Webapp	Sessions	Unique	IP Addresses
simplebar with ImageMapHandler	1451	215	199
chat	3484	207	184
Map	3609	297	266
PDF Test	751	198	190
Infos	1351	317	292
simplePie with MouseClicks explode	910	249	223
animated bar	1198	214	197

Each web app made a lot of session. Sessions happen if a crawler like Google queries the website. So we did a query how many unique combinations exist between Browser, platform and IP address which gives better idea about how many users are there. Also we checked how many unique IP addresses we have.

The PDF Test web app created 180 PDF files.

We had this browsers:

Browser	Number of sessions
Andriod	1
Blackberry	2
Firefox	139
InternetExplorer	26
Opera	12
Safari	2815
SafariMobile	33
Unknown	456

Conclusion:

It may be difficult to know whether a user got on our app or maybe google just queried the page content. You see that on the PDF example, where we only got 180 PDFs for for over 751 sessions.
And if you want to store data in a web app, you have to think about using a database. Even for logging. To write you need exclusive access and your web app may run in several instances and server several users at the same time. So you can't write to text files. Using a database leaves the locking up to the database server and your app is just a client.